639080490 has 32 divisors (see below), whose sum is σ = 1624017600. Its totient is φ = 160396544.

The previous prime is 639080483. The next prime is 639080501. The reversal of 639080490 is 94080936.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 626040 + ... + 627059.

It is an arithmetic number, because the mean of its divisors is an integer number (50750550).

Almost surely, 2^639080490 is an apocalyptic number.

639080490 is an abundant number, since it is smaller than the sum of its proper divisors (984937110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

639080490 is a wasteful number, since it uses less digits than its factorization.

639080490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253126.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 639080490 is about 25280.0413369915. The cubic root of 639080490 is about 861.3609648180.

The spelling of 639080490 in words is "six hundred thirty-nine million, eighty thousand, four hundred ninety".